Vacuum apparatus for supplying liquids



G. A. PURDY VACUUM APARATUS FOR SUPPLYING LIQUIDs March 4l Filed July 2, 1919 Patented Mar, d, 192.,

GEORGE A. PURDY, 0F SEATTLE, WASHINGTON.

VACUUM APPARATUS 'Fon sUPPLYING LIQUIDs.

Application led July 2,

To all whom it may concern.'

Be it known that l, Gnoucn A. PURDY, a citizen of the United States, residing at Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Vacuum Apparatus for Supplying Liquids; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in apparatus of the type involving means for creating a vacuum or suction tendency in a tube or connection extending between a source of liquid supply and a point to which the liquid is to be supplied.

It is one of the important objects of the present invention to improve that type of apparatus commonly known as a vacuum suction fuel supply system in which there is employed an intake or suction tube extending into a container holding, for instance, a supply of gasolene or other liquid, the tube having extending from it a pipe or other suitable conductor connected to an intermediate receiver in which there is created a partial vacuum serving to draw the liquid or fuel from the reservoir or tank to the receiving device and from which it may be discharged as required as, for instance, into the carburetor of an internal combustion engine.

The improvement consists in constructing and arranging the intake tube and in combining therewith a control means so that in ordinary operation liquid orv gasolene from the tank could be regularly drawn down to a predetermined level which, when reached during the exhaustion of the liquid from lthe tank, would ltend to break the suction eti'ect of the liquid` although leaving a suitable quantity of the liquid as a reserve still'in'the tank.

The purpose of this improvement specifically is to'obtain a reserve supply and give a warning to the operator of the motor that such reserve supply has been reached by the exhaustion of the fluid in excess thereof from the tank and consequently enable the operator by simple adjustment of the device to proceed with the knowledge of having only the' reserve supply to draw from tor a continued operation of the motor.

`With the above and other objects in view as will be readily manifest to those versed 1919. Serial No. 308,103.

in the art the invention consists in the combination and in details and arrangement of the parts as will be more particularly described hereinafter relative to the embodiment of the invention illustrated in the accompanying drawin s, wherein:

Figure 1 is a si e elevation of the apparatus as organized in relation to an automobile shown in dotted lines.

Figure 2 is a vertical sectional detail view substantially to full scale or size, the parts being broken away.

At present there is in general use a wellknown practicable, etiicient and highly satisfactory apparatus or system for supplying internal combustion engines with suitable fuel in accordance with the demands of the operation of the motor, the system operating upon the principle of creating a partial vacuum during the operation of the/motor,

vindicated at 2, in an intermediate receiver or chamber 3 connected by a suction or vacuum pipe 4 to the intakemanifold of the motor; the partial vacuum created in the receiver 3 being extended through a connecting tube or conductor 5 to a suction pipe 6 vshown in dotted lines in Figure l as extending into the gasolene tank 7.

`Ordinarily, systems of this kind will, during the operation of the motor, draw the gasolene in necessary quantities from the tank 7, the gasolene passing upwardly through the suction pi e 6, the lower end of which is opened adJacent to the bottom of the tank 7 and, therefore, it frequently occurs that the gasolene will be wholly exhausted from the tank before the operator of the vehicle becomes aware of the fact except by cessation Vof the operation of the engine because of lack of supply.

My present invention is designed to improve this fuel supply system so that instead of wholly drawing the supply of gasolene from the tank 7 and thus leaving the engine stalled for lack of supply means are provided which can be arranged so that the gasolene can be drawn down to a predetermined level in theusual manner and thereafter orat the time when this level is reached break the suction or withdrawal of gasolene from the tank, and thus leave a reserve supply of fuel which can be drawn from the tank by the simple setting of a control or valve device, which I will now describe.

ln Figure 2 the suction pipe 6, the lower end of which shown as open as at 8 and extends in suitable proximity to the bottom of the tank 7, is provided at a suitable point above its lowermost end vwith a vent hole or aperture 9, and within the lower portion of the pipe 6 there is a tubular plug or core l() circumferentially iitting and sliding in the tube 6. The plug or core has its upper end disposed in juxtaposition to the vent hole 9 so that when pushed down by means of a stem 11 having a knob 12 at its upper end and, passing through a packing gland 13 the vent 9 is uncovered, so that the fuel above the level of the vent can be drawn into the suction pipe 6 and upwardly therethrough and outwardly through outlet ports 14 formed in the upper portion of the pipe 6, which is here shown as enlarged and threaded into a bushing l5 in the top of the tank. The enlarged portion of the suction pipe 6 may be provided withA an annular groove 16 and fitting over the body of the upper end of the pipe is a sleeve or casing 17 to which the connecting o1; suction tube 5 is appropriately attached, as at 5a.

lln the normal operation of the system the knob 12 of the suction plug 10 is pressed 'down to any suitablestop and the vent is therefore uncovered and gasolene canv be drawn through the suction pipe 6 to supply a motor, but in the event of the withdrawal of all of the gasolene down to the level of the vent 9, then the operator, ,being warned of the depletion of the supply by failure of his engine, will adjust the position of the plug l0 by pulling up on the stop 12 so that the plug will cover the vent 9 and thereafter said tubular member and 2. An attachment for a fuel tank compris-V the operation of the motor will cause asuction of the reserve supply through the bottom end of the pipe 6 in which case the gasolene passes upwardly through the coreor plug-like device 10.

lt is understood that alterations and moditications as to the construction and arrangements of the parts may be resorted to Within the spirit of the invention and the scope of the appended claims and that the disclosures in the present drawings is exemplary of one embodiment of the invention.

lVhat l claim is:

1. The combination with a fuel tank, of a delivery conduit leading therefrom to a motor, a tubular member extending into said tank and formed with an open end disposed adjacent the bottom of said tankand a port spacedv from said open end, an open-.

ended-tube fitting snugly within said tubular member between the end thereof and said port, means operable from without said tank for sliding saidtube over said port to cause the flow of fuel from said tank to said de livery tube only through th?O open ends of tu e.

ing a tubular member, means forming a threaded detachable connection between said nascere member and the tank, the up er portion of said member having a port or connection with a delivery conduit, the lower end of said tubular member extending into said tank adjacent the base thereof and formed with a port spaced from said end, an open-ended tube snugly `fitting Within said tubular member between the end thereof and' said'port,

said tube having an integral` portion extending upwardly through said member to a point outside said closed end for shifting said tube across said port to permit the fuel to How into the tube only through the .open end thereof.

8. A device of the `class described comprising a tubular member bodily insertable `through an opening in the wall of a fuel provided at its upper end with means where' by it may be held in dependin position Within said tank,` said member a so havingl at its upper end a connection with the delivery conduit leading to the motor and having two ports spaced along its lower end, a tube movable Within said member and adapted tocover and uncover one of said ports, and means extending longitudinally of said member and operable from its upper end without the tank for moving said tube, said means permitting the freel passage of fuel. through said member to the motor.

5. A fuel control device comprising a tube insertable through the top of a tank to a point adjacent the bottom thereof, said tube having4 a discharge passageway adjacent its upper end and upper and lower inlet passageways below said discharge passageway, a valve for controlling said upper inlet passageway, and operating means for said valve projecting longitudinally through -the out'e'r` end of the tube.

6. A fuel control device comprising a tank, a tube projecting .through the top of the tank to a point adajcent to the bottom thereof, an aspirator connected. with the tube adjacent to the upper end thereof, said tube having Aan inlet passageway below the top of the tank, a valve for controlling said inlet passagewa ,and an operating niember for the va ve disposed longitudinally within said tube and 4operable from the discharge end thereof.

ln testimony whereof l affix my signature.

` GERGE A. PURDY.

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